PHOTOS: Georgia Bulldogs vs. Alabama Crimson Tide

DeVonta Smith #6 of the Alabama Crimson Tide catches a 41 yard touchdown pass to beat the Georgia Bulldogs in the CFP National Championship presented by AT&amp;T in overtime at Mercedes-Benz StadiumGeorgia. (Photo by Kevin C. Cox/Getty Images)

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DeVonta Smith #6 of the Alabama Crimson Tide catches a 41 yard touchdown pass to beat the Georgia Bulldogs in the CFP National Championship presented by AT&amp;T in overtime at Mercedes-Benz StadiumGeorgia. (Photo by Kevin C. Cox/Getty Images)

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8:16PM: (Associated Press) President Donald Trump was on the field for the national anthem before the College Football Playoff national title game.

Trump walked onto the field accompanied by the ROTC units from Georgia and Alabama. He was greeted by mostly cheers from the crowd on hand to watch the game between Alabama and Georgia.

Trump waved to the crowd before the Zac Brown Band sang the anthem. Hand placed over his heart, Trump appeared to sing along at times.

No players were on the field yet. That's unlike the NFL, where some players this season protested racial injustice by kneeling during the anthem - often drawing Trump's ire.

PHOTOS: President Donald Trump at National Championship Game

US President Donald Trump sits in Mercedes-Benz Stadium in Atlanta on January 8, 2018.
Trump is attending the College Football Playoff National Championship between the University of Georgia Bulldogs and the University of Alabama Crimson Tide. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

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US President Donald Trump sits in Mercedes-Benz Stadium in Atlanta on January 8, 2018.
Trump is attending the College Football Playoff National Championship between the University of Georgia Bulldogs and the University of Alabama Crimson Tide. / AFP PHOTO / JIM WATSON (Photo credit should read JIM WATSON/AFP/Getty Images)

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7:07PM: (Associated Press) Mercedes-Benz Stadium has a bit of water dripping on to the sideline, seemingly coming from high above the field.

Around the 20-yard line on Alabama's side of the field, but off the playing field, a few drops could be spotted falling on to the green artificial turf.

A stadium security worker wearing a blue shirt was standing where the water was landing and had wets spots on his shirt.

There have been issues with the stadium's signature retractable roof since construction began on the facility. The roof has only been opened once for football since the stadium opened in August.